Structure of male and female reproductive in mammals
Mammals are bi-parental in reproduction that is sexual reproduction involves two distinct and separate individual, sexually mature male and female.
MALE REPRODUCTIVE SYSTEM
The male reproductive system in man consists of testes (singular testis) vasa efferentia vas deferens (sperm duct) penis and glands.
There are two testes each testis is oval in shape and is housed in a wrinkled sac called scrotum. The scrotum hangs out of the body behind the penis.
The body temperature is too high for the formation of sperm hence the testes are positioned out of the body that is slightly cooler (2.30 C lower) than the normal body temperature when there is cold the scrotal sac contracts and the testes are moved nearer the body.
Each testis is made of a large number of tiny tubes called seminiferous tubule (sperm tubule) and interstitial cells. The seminiferous tubule produce sperm while the interstitial cells produce testosterone (male sexual hormone).
Vasa efferentia are small number of tubes which are connected with seminiferous tubules and unite to form epididymis. Vasa efferentia collect sperm from the seminiferrous tubules to the epididymis.
This is a highly coiled tube. It receives sperm from vasa efferentia. One epidymis serves as testis sperm are temporarily stored to mature and develop in the epididymis.
VAS DEFERENS (SPERM DUCT)
Each vas deferens leads from the epidermis to join a common tube called the urethra. the urethra serves as a passage for both urine and sperm.
The penis is an organ through which the urethra runs. The enlarged end of the penis is called glands. The skin extending downward from the glands is called foreskin (prepuce)
Inside the penis is an erectile or spongy tissue which the blood vessel of the erectile tissue is loaded with blood. The penis gets erect and it can be inserted into the vagina during sexual intercourse.
The glands open into the male reproductive system. These are seminal vesicle prostrate gland and cowpea gland. There three glands secrete seminal fluid in which the sperm swim the fluid activated sperm into swimming. it provides food for its sperm and lubricate their passage. sperm swim freely in the seminal fluid.
The seminal fluid plus the sperm is called semen.
STRUCTURE AND FUNCTION OF MALE REPRODUCTIVE SYSTEM
Attachment of tests to the sc wall.
Production of spermatozoa and male hormone
Storage of spermatozoa
To convey spermatozoa from the testis
To exert fluid form the action of the spermatozoa
To secrete a fluid for the activation of spermatozoa
To secrete fluid on the sperm
For introducing sperm into vaginal, conduct urine from bladder
Enclose and protect the testis
Diagrammatic representation of male reproductive organ